在你的函数中试试这个。php：

add_filter( \'woocommerce_quantity_input_args\', \'control_product_qty_input\', 20, 2 );
function control_product_qty_input( $args, $product ) {

    $settings = array(\'49\' => 3, \'48\' => 10); // for product id 49 3 products set
    foreach ($settings as $k => $v) {
        if($k === $product->get_id()){
            $args[\'max_value\'] = $v;
            $args[\'min_value\'] = $v;
        }
    }

    return $args;
}

注意#2：此代码仅适用于单个产品视图。

编辑：您可以像这样在下拉列表中有多个值：（但我仍然对现有输入有一些问题，我不明白为什么。请与我一起尝试以下代码：）

add_filter( \'woocommerce_quantity_input_args\', \'control_product_qty_input\', 20, 2 );
function control_product_qty_input( $args, $product ) {

    $settings = array(\'49\' => array(5, 8, 10, 13), \'48\' => array(2, 4));
    $options = \'\';

    $defaults = array(
        \'input_name\'    => \'quantity\',
        \'input_value\'   => \'1\',
        \'max_value\'     => apply_filters( \'woocommerce_quantity_input_max\', \'\', $product ),
        \'min_value\'     => apply_filters( \'woocommerce_quantity_input_min\', \'\', $product ),
        \'step\'      => apply_filters( \'woocommerce_quantity_input_step\', \'1\', $product ),
        \'style\'     => apply_filters( \'woocommerce_quantity_style\', \'float:left; margin-right:10px;\', $product )
    );

    $html = \'<div class="quantity_select" style="\' . $defaults[\'style\'] . \'"><select name="\' . esc_attr( $defaults[\'input_name\'] ) . \'" title="\' . _x( \'Qty\', \'Product quantity input tooltip\', \'woocommerce\' ) . \'" class="qty">\';

    foreach ($settings as $k => $v) {
        if($k === $product->get_id()){
            foreach ($v as $v) {
                $options .= \'<option value="\' . $v . \'">\' . $v . \'</option>\';
            }
        }
    }
    $html .= $options . \'</select></div>\';

    echo $html;
}